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net: phylink: update mac_config() documentation 

A detail for mac_config() had been missed in the documentation for the
method - it is expected that the method will update the MAC to the
settings, rather than completely reprogram the MAC on each call.
Update the documentation for this method for this detail.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2019-02-22 11:31:41 +00:00 committed by David S. Miller
parent c2f26e8f87
commit 0e29ae0303
1 changed files with 7 additions and 0 deletions
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7
include/linux/phylink.h
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@ -149,6 +149,13 @@ int mac_link_state(struct net_device *ndev,
* configuration word. Nothing is advertised by the MAC. The MAC is
* responsible for reading the configuration word and configuring
* itself accordingly.
*
* Implementations are expected to update the MAC to reflect the
* requested settings - i.o.w., if nothing has changed between two
* calls, no action is expected. If only flow control settings have
* changed, flow control should be updated *without* taking the link
* down. This "update" behaviour is critical to avoid bouncing the
* link up status.
*/
void mac_config(struct net_device *ndev, unsigned int mode,
const struct phylink_link_state *state);